Which of the following situations would be most similar to an electrical current passing through a metal wire in a closed circuit

1. Hot water moving through a pipe.
2. And automobile traveling through a tunnel.
3. An airplane flying through clouds.
4. A frying pan, heating up on a hot plate.
5. A bird building a nest.

The most similar situation to an electrical current passing through a metal wire in a closed circuit would be option 4: A frying pan heating up on a hot plate. In this scenario, energy is being transferred through a conductor (the metal frying pan) to produce heat, similar to how electrical energy flows through a metal wire to produce electricity.